-80.02% is the change from 861 to 172
Calculation steps:
[( 172 - 861 ) ÷ 861] x 100 = -80.02%
Formula
Percentage change = [(172 - 861) / 861] x 100
Subtract the new number by the original number
172 - 861 = -689
-689 ÷ 861 = -0.8002322880371661
-0.8002322880371661 x 100 = -80.02%